Datasheet

TLV2541, TLV2542, TLV2545
2.7-V TO 5.5-V, LOW-POWER, 12-BIT, 140/200 KSPS,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTOPOWER DOWN
SLAS245E −MARCH 2000 − REVISED APRIL 2010
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
ac specifications (f
i
= 20 kHz)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SINAD
Signal to noise ratio +distortion
200 KSPS, V
DD
= V
REF
= 5.5 V 70 72
dB
SINAD Signal-to-noise ratio +distortion
150 KSPS, V
DD
= V
REF
= 2.7 V 68 71
dB
THD
Total harmonic distortion
200 KSPS, V
DD
= V
REF
= 5.5 V −84 −80
dB
THD Total harmonic distortion
150 KSPS, V
DD
= V
REF
= 2.7 V −84 −80
dB
ENOB
Effective number of bits
200 KSPS, V
DD
= V
REF
= 5.5 V 11.8
Bits
ENOB Effective number of bits
150 KSPS, V
DD
= V
REF
= 2.7 V 11.6
Bits
SFDR
Spurious free dynamic range
200 KSPS, V
DD
= V
REF
= 5.5 V −84 −80
dB
SFDR Spurious free dynamic range
150 KSPS, V
DD
= V
REF
= 2.7 V −84 −80
dB
Analog Input
Full-power bandwidth, −3 dB 1 MHz
Full-power bandwidth, −1 dB 500 kHz
external reference specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Reference input voltage V
DD
= 2.7 V to 5.5 V 2 V
DD
V
V 55 V
CS = 1, SCLK = 0 100 MΩ
Reference input impedance
V
DD
= 5.5 V
CS = 0, SCLK = 20 MHz 20 25 kΩ
Reference input impedance
V 27 V
CS = 1, SCLK = 0 100 MΩ
V
DD
= 2.7 V
CS = 0, SCLK = 20 MHz 20 25 kΩ
Reference current
V
DD
= V
REF
= 5.5 V, CS = 0, SCLK = 20 MHz 100 400
μA
Reference current
V
DD
= V
REF
= 2.7 V, CS = 0, SCLK = 20 MHz 50 200
μA
V V 55 V
CS = 1, SCLK = 0 5 15
Reference input capacitance
V
DD
= V
REF
= 5.5 V
CS = 0, SCLK = 20 MHz 20 45 50
pF
Reference input capacitance
V V 27 V
CS = 1, SCLK = 0 5 15
pF
V
DD
= V
REF
= 2.7 V
CS = 0, SCLK = 20 MHz 20 45 50
V
REF
Reference voltage V
DD
= 2.7 V to 5.5 V V
DD
V
dc specification, V
DD
= V
REF
= 2.7 V to 5.5 V, SCLK frequency = 20 MHz at 5 V, 15 MHz at 3 V (unless otherwise
noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INL Integral linearity error (see Note 4) ±0.6 ±1 LSB
DNL Differential linearity error See Note 3 ±0.5 ±1 LSB
E
Offset error (see Note 5)
See Note 3
TLV2541/42 ±1.5
LSB
E
O
Offset error (see Note 5) See Note 3
TLV2545 ±2.5
LSB
E
Gain error (see Note 5)
See Note 3
TLV2541/42 ±2
LSB
E
G
Gain error (see Note 5) See Note 3
TLV2545 ±5
LSB
E
Total unadjusted error (see Note 6)
See Note 3
TLV2541/42 ±2
LSB
E
t
Total unadjusted error (see Note 6) See Note 3
TLV2545 ±5
LSB
NOTES: 3. Analog input voltages greater than that applied to V
REF
convert as all ones (111111111111).
4. Linear error is the maximum deviation from the best straight line through the A/D transfer characteristics.
5. Zero error is the difference between 000000000000 and the converted output for zero input voltage: full-scale error is the difference
between 111111111111 and the converted output for full-scale input voltage.
6. Total unadjusted error comprises linearity, zero, and full-scale errors.